package com.nannybear.Model;

import java.util.Observable;
import java.util.Observer;

/**
 * @brief abstract class for the constants.
 */
public abstract class Constant extends Observable{
    /************ METHODS ************/
    /**
     * @brief constructor
     */
    public Constant(){
    }

    /**
     * @brief add an observer
     */
    public abstract void addObserver(Observer obs);

    /**
     * @brief delete an observer
     */
    public abstract void deleteObserver(Observer obs);

    /**
     * @brief notify observers that the object has changed
     */
    public abstract void notifyObservers();
}
